few tweaks to locale files

src/_locales/de/messages.json

@@ -481,7 +481,7 @@
   },
   "valueCopied": {
     "message": " kopiert",
-    "description": "' copied'. This is part of a sentence to be sure to leave the space prefix. For example: 'Password copied'"
+    "description": "' copied'. This is part of a sentence so be sure to leave the space prefix. For example: 'Password copied'"
   },
   "autofillError": {
     "message": "Die Felder dieser Seite konnten nicht automatisch ausgefüllt werden. Bitte Nutzernamen und/oder Passwort manuell kopieren.",

src/_locales/en/messages.json

@@ -33,7 +33,7 @@
   },
   "submit": {
     "message": "Submit",
-    "description": "submit"
+    "description": "Submit"
   },
   "emailAddress": {
     "message": "Email Address",
@@ -481,7 +481,7 @@
   },
   "valueCopied": {
     "message": " copied",
-    "description": "' copied'. This is part of a sentence to be sure to leave the space prefix. For example: 'Password copied'"
+    "description": "' copied'. This is part of a sentence so be sure to leave the space prefix. For example: 'Password copied'"
   },
   "autofillError": {
     "message": "Unable to auto-fill the selected site on this page. Copy/paste your username and/or password instead.",

src/_locales/fi/messages.json

@@ -481,7 +481,7 @@
   },
   "valueCopied": {
     "message": " kopioitu",
-    "description": "' copied'. This is part of a sentence to be sure to leave the space prefix. For example: 'Password copied'"
+    "description": "' copied'. This is part of a sentence so be sure to leave the space prefix. For example: 'Password copied'"
   },
   "autofillError": {
     "message": "Automaattinen täydennys tälle sivustolle ei onnistu. Kopioi ja liitä käyttäjänimesi/salasanasi manuaalisesti.",

src/_locales/fr/messages.json

@@ -33,7 +33,7 @@
   },
   "submit": {
     "message": "Soumettre",
-    "description": "submit"
+    "description": "Submit"
   },
   "emailAddress": {
     "message": "Adresse e-mail",
@@ -481,7 +481,7 @@
   },
   "valueCopied": {
     "message": " copié",
-    "description": "' copied'. This is part of a sentence to be sure to leave the space prefix. For example: 'Password copied'"
+    "description": "' copied'. This is part of a sentence so be sure to leave the space prefix. For example: 'Password copied'"
   },
   "autofillError": {
     "message": "Impossible de remplir automatiquement le site sélectionné sur cette page. Copiez/collez plutôt votre nom d'utilisateur et/ou votre mot de pase.",

src/_locales/ru/messages.json

@@ -33,7 +33,7 @@
   },
   "submit": {
     "message": "Отправить",
-    "description": "submit"
+    "description": "Submit"
   },
   "emailAddress": {
     "message": "Email",

src/_locales/zh_CN/messages.json

@@ -33,7 +33,7 @@
   },
   "submit": {
     "message": "提交",
-    "description": "submit"
+    "description": "Submit"
   },
   "emailAddress": {
     "message": "Email 地址",
@@ -481,7 +481,7 @@
   },
   "valueCopied": {
     "message": " 已复制",
-    "description": "' copied'. This is part of a sentence to be sure to leave the space prefix. For example: 'Password copied'"
+    "description": "' copied'. This is part of a sentence so be sure to leave the space prefix. For example: 'Password copied'"
   },
   "autofillError": {
     "message": "无法在此页面自动填充所选择的网站。请手工 复制/粘贴 您的用户名、密码。",